Engine-starting device.



s. DILLoN & J. RICHARDSON.

ENGINE STARTING DEVICE. .ArrLmA'rroN rILsn snrrfls. 190s.

Patented Apr. zo, 1909.

2 SHEETS-'SHEET 1.

wrrN Ess'zs Y s. BILL-'0N @L J. RICHARDSON.'

, ENGINE STARTING DEVICE.' l

AIfPLIOATION'PILED SEPT. 187. 1908.

Patented Apr. 20, 1909.- 2 SHEETS-'SHEET 2` INVENTOR S A .mm

wlTN Es'st THE NaRms PETERS co., llAsmNcraN. D.

UNirHD srATHs @PATENT rHm- 'sYnNRY DILLON, or HDGEWOOD PARK, AND JOHNRICHARDSON, or NORTH BRADDOOK,

` 4PENNSYLVANIA.

y nNorNR-s'rAR'rINcy nnvrcin.

Specification of Letters Patent.

Patented April 20, 1909.

Application filed September 18, 1908. Serial No. 453,633.

To all whom it may concern:

Be it known that we, SYDNEY DILLON, of Edgewood Park, Allegheny county,Pennsylvania, and JOHN RICHARDSON, of North Braddock, Allegheny county,Pennsylvania, have invented a new and useful Enginef Starting Device, ofwhich the following is a full,`clear, and exact description, referencebeing had to the accom anying drawings, forming part of thisspecincation, in which- Figure 1 is a longitudinal sectional sideelevation of our improved apparatus applied for use in connection with asteam engine or other motor g Qig. 2 is a sectional end elevation of thesame taken on the line II-Il of lig. 1 Fig. 3 is a top plan view of thestartlng apparatus shown in igs. 1 and 2; and liigs. 4 and 5 are detailviews on a larger scale showing the cross-head forming part ofl theapparatus.

The invention relates to apparatus employed in starting steam engineswhich must be moved off center, preparatory to starting them inoperation, and `to motors generally, in which necessity calls forturning the motor by a step by step movement, each step moving the motorthrough a smallpart of a revolution. V

The object of our invention is to provide improved apparatus by the useof whichsuch motors may be moved by such step by step movement and bywhich the motors may be rotated in either direction as is desired.

A further object ofour invention is to provide apparatus by which themotor is moved and is held in its moved position after each step by stepmovement of the lily wheel or pulley. Y

The inventionconsists in apparatus cornprising a fluid pressure cylinderhaving connections arranged to engage with the fly wheel or drivingpulley of a motor and revolve the wheel by a step by step movement,

each step moving the wheel through a part of a revolution.

The invention further consists in mounting the turning dogs forming partof the apparatus so as to permit of their being used to rotate the wheelor pulley in either of opposite directions and in arranging the dogswith relation to each other so that one dog will hold the wheel in itsmovedv position until such time as the seconddog engages with and startsto move the-wheel in the next step of the turning operation.

ln the drawings, 2 represents the fly wheel l or driving pulley of asteam engine or other motor, the peripheral face of this fly wheel beingprovided with a series oi barring notches 3. Located in front Oi' and inline with the wheel is our improved starting apparatus, the frame 4 ofwhich is securely held on a suitable foundation provided for thatpurpose, andY secured to the frame 4 is a iiuid pressure cylinder 5which is provided with a reciprocating piston 6 and piston rod 7. Thecylinder 5 is provided with ports 8 and 8', these ports being connectedby suitable pipingwith a source of fluid pressure, a hand-operated valvebeing placed in the piping in a suitable location for operating thecylinder, Pivotally mounted on pins or shafts 9 are thebell cranks 11and 12, the shafts being secured .in place in suitable bearings providedon the frame 4 by means of the set screws 10. One arm of each of thebell cranks 11 and 12 is forked so as to embrace the sides oi the crosshead 13, which is keyed or otherwise secured in place on the piston rod7 so asto be reciprocated with the piston rod 7 by the piston 6. Theforked ends of the bell-cranks 11 and 12 which are connected to thecross-head are provided with pins 14 and 15,these pins extending throughthe slots 17 and 18 in the cross head 13. A bearing 16 is rotatablysecured on each of the pins14and 15 and these bearings are arranged toslide in the slots 17 and 18 provided i'or that purpose in the crosshead 13, when the bell-cranks are actuated in moving the engine. Thecross-head 13 is provided with oppositely extending wings or guides 19which reciprocate between the slides 20, the slides 20 being removablysecured in the slots provided for that purpose in the sides of the frame4. The opposite arms on each of the bell-cranks 11 and 12 also areforked, and swinging dogs 21 and 22 are mounted upon pinsor shafts 23which are pivoted in the bearings provided on the yarms 11 and 12. Thedogs 21 and 22 each have projecting fingers 24, 24a, 25 and 25a, whichare arranged to engage in the barring notches 3 on the iiy wheel andmove the fly wheel when the apparatus is actuated. The dogs21 and 22 areeach provided with a counterweight 26 by which these dogs are yieldinglyheld in contact with the face of the fly wheel, the counterweights beingmounted on counterweight arms 27 which are located angularly with regardto the dogs 21 and 22 so as to hold the dogs in contact with the laceol' the i'ly wheel when the wheel is being moved by the other of thedogs, and hand turning levers 30 are provided for turning the dogs 21and 22 and shafts 23 into and out ol their operative positions.

lVhen the engine or other motor is being driven to operate the mechanismwith which it is connected, the dogs 21 and 22 are held in theirinoperative position and out oi' engagement with the wheel. To insurethese dogs being held in their inoperative position and remove anypossibility oll their coming in contact with the wheel during therunning of the motor, holes 28 are provided in the arm ol' the dogswhich register with similar holes 29 in the bell-cranks, and a lockingpin or bolt is inserted in these holes so as to secure the dogs inposition out oll contact with the wheel and prevent any movement ol' thedogs.

In the operation of the apparatus, the locking pins are first removedfrom the holes 28 and 29 inthe bell-cranks and dogs. The dogs 21 and 22are then turned into the position shown by full lines in the drawing,the fingers 24a and 25a on the dogs being yieldingly held in Contactwith the Vlace of the wheel 2 by the counterweights. The valvecontrolling the supply of iiuid pressure to the cylinder 5 is thenmanipulated by the operator so as to admit fluid pressure into one endor the other of the cylinder and reciprocate the piston 6, this movementol the piston reciprocating the cross head on the slide 2O so as to rockthe bell-cranks 11 and 12 on the pins or shalts 9. As the piston movestoward the stuffing box end of the cylinder from the central positionshown, the wheel 2 is moved in the direction of the arrow and when thepiston 6 has reached the end olA` its stroke, the finger 25 on the dog22 will have engaged with the adjacent barring notch in the face of theWheel. The valve operating mechanism is then moved to cause the pistonto travel in the opposite direction when the dog 22 will be movedupwardly and by reason ol the engagement ol' its inger 25a with thebarring notch will move the wheel another step i'orward in the directionof the arrow. When the dog 22 is being advanced upwardly, the dog 21will be moved in the opposite direction and by the time the dog 22 hasbeen moved to the full extent oi its stroke, the linger 2ea on the dog21 will have engaged with another of the barring notches in theperiphery of the Wheel. The above operations are repeated as often as isnecessary to move the engine throughout the desired part ol a revolutionor the desired number of revolutions, should such occasion arise.

vWhen it is desired to move the engine or motor in a direction oppositeto that indicated by the arrow, the dogs 2l and 22 are swung about theaxis of the shafts 23 so as to extend in a direction shown h v dottedlines, the counterweight 27 in this ease also yieldingly holding thedogs in engagement with the face ol' the wheel. then the dogs are inthis position, the lingers 24- and 15 on the dogs 21 and 22 are inengagement with the wheel and enter the successive barring notches 3when the bell cranks are actuated by means of the piston G and fluidpressure cylinder 5 and gradually turn the wheel in the oppositedirection to that indicated hy the arrow.

The advantages of our invention wil he apparent to those skilled in thcart. The engine is moved positively through a part ofv a revolution byeach forward or backward stroke of the piston, and the wheel is held iuits moved position after the completion of each step by stop movement.The wheel can be turned in either direction to any oxtent that may bedesired.

The apparatus is simple and is easily kept in repair.

Another advantage oli the invention is that the apparatus may be used toturn the ily wheel or driving pulley of a rolling mill motor so as toslacken the coupling boxes on the wabblers of the rolls and theconnecting spindles, and the motor can he. moved to such an extent andwith such ease that this apparatus can be employed, instead ol. wastinga large amount of time usually neeessary in performing this operation,by means ol' the motive power of the motor.

lt will be understood that we do not limit our invention toreciprocating engines having fly wheels, as it is equally applicable tomotors having belt pulleys or sheave wheels.

Modifications in thc,construction and arrangement of the parts may bemade. lnstead of having a double arrangement oldogs and bell-cranks, asingle dog may he employed which would require but a single bell-crank.The apparatus may be constructed to move the motor in one direction andmany other changes may be made without departing from our invention.

lWe claim :H

1. Apparatus for starting motors havingr a wheel comprising a dogarranged to swing into and out of engagement with barring notches in therim of the wheel, and lluid pressure means connected to the dog andadapted to actuate the dog to rotate the wheel; substantially asdescribed.

2. Apparatus for starting motors having a wheel comprising a dogarranged to swing into and out of engagement with barring notches in therim of the wheel7 and having a counterweight for holding the dog incontact with the wheel, and iluid pressure means arranged to actuate thedog and rotate fho wheel; substantially as described.

3. Apparatus for starting motors having a in the rim of the wheel andfluid pressure means connected to said dogs, and adaptedV to actuate thedogs toirotate the wheel; substantially as described. i.

4. Apparatus for starting ,motorsh'aving a wheel comprising dogsVarranged to swing into and out of engagement with barring notches inthe rim of the wheel, counterweights arranged'to hold the dogs incontact with the wheel and luidY pressure means rarranged to actuate thedogs and rotate the wheel; substantially as described.

5. Apparatus for starting motors having a wheel comprising swinging dogsarranged to be moved into engagement with barring notches in the rim ofthe wheel and oppositely projecting -fingers on the end of the dogs, andiiuid pressure means connected to the dogs and adapted to actuate thedogs to rotate the wheel in either direction, the iingers on one side ofsaid dogs adapted to engage with and move the wheel in one direction,the opposite `lingers engaging with and moving the wheel in the oppositedirection; substantially as described.` Y

6. Apparatus for starting motors having a wheel comprising a frame," abell-crank pivotallymounted thereon, aswinging dog pivotally mounted onythe bell-crank, and arranged to be swung into and out of engagementwith barring notches 'in the rim ofthe wheel, and means for rocking thebell-crank to move the dog and rotate the wheel; substantially asdescribed. 1

7. Apparatus for starting motors'having a Wheel comprising a frame,bell-cranks piv otally mounted thereon, swinging dogs pivotally mountedon the vbell-cranks, and ar# ranged to contact with barring notches inthe rim of the wheel and iluid pressure means for rocking thebell-cranis to move the dogs and partly rotate the wheel, `the dogsbeing ar`n ranged to alternately move the wheel; substantially asdescribed. j

8. Apparatus for-starting motors having a wheel comprising a frame,bell-cranks pivotally mounted thereon, alswinging dog pivotally mountedon' an-arm of each 'bell crank and arranged to engage with barringnotches in the rim of the wheel, a reciprocating cross head havingsliding engagement with the other arms of said bell-cranks, yand fluidpressure means for actuating said cross-head to rock the bell-cranks androtate the wheel;`

substantially as described. p

9. Apparatus for starting motors having a wheel comprising a frame,bell-cranks pivotally mounted thereon, a dog pivotally mounted on thearm of each of the bell-cranks and extending forwardly into contact withthe rim oi' the wheel, a counterweight connected said dogs in contactwiththe wheel, a crosshead mounted on the frame arranged to reciprocatethereon having sliding connections with one arm of each bell-crank, aliuid pressure cylinder mounted on the frame having a piston and pistonrod connected to said crosshead,1and arranged to actuate the cross-headto move said dogs; substantially as described.

10. Apparatus 'or starting motors having a wheel comprising a dogarranged to swing into and out oi' engagement with barring notches inthe rim oi' the wheel, and a motor connected to and arranged to actuatethe dog to rotate the wheel; substantially as described.

11.` Apparatus for starting motors having a wheel comprising a dogarranged to swing into and out oi engagement with barring notches in therim of the wheel, means i'or holding the dog in contact with the wheeland means connected with the dog and arranged to actuate the dog torotate the Wheel; substantially as described.

12. Apparatus for starting motors comprising a pair of pushing dogs, amotive device and connections between the motive de vice and dogs forcausing the latter to alternately engage and move the motor through apart of a revolution when said motive device is actuated, substantiallyas described.

13. Apparatus for starting motors having `a wheel comprising a pair ofpushing dogs, a

motive device, and connections between the motive device and the dogsfor causing the latter to alternately engage with and actuate the wheel,one of the dogs engaging the wheel when the other is disengagedsubstantially as described.

. 14. Apparatus for starting motors having a wheel comprising a pair ofpushing dogs, a

motive device, and connections between the motive device and the dogs'for causing the latter to alternately engage with and actuate thewheel, and means for holding the dogs out of operative position;substantially as described.

15. Apparatus for starting motors having a wheel comprising a pair ofpushing dogs, a

motive device and connections between the motive device and the dogsi'or causing the dogs to be rocked in opposite directions when themotive device is operated; substantially with the dogs arranged toyieldingly hold vided with a series of barring notches for the rini oithe Wheel, of a dog arranged to swing neeted to and arranged to aetuatethe dog to 10 into and out of engagement with the notches move theWheel.

and Huid pressure means connected to the ln testimonyr whereof, we havehereunto dog and adapted to aetuate the dog tonrove set our hands. theiy-Wheel. SYDNEY DlLLON.

18. The combination with a iy-Wheel pro- JOHN HCHA RDSON, vided withbarring notches in its rim, of a Wvitnesses: dog arranged to swing intoand out of en- G. E. F. GRAY,

gagelnent with the notehes and a mot-or eon- FRANK A. POWER.

